CN108089388B - Method for selectively controlling working voltage of electric dimming device - Google Patents

Method for selectively controlling working voltage of electric dimming device Download PDF

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CN108089388B
CN108089388B CN201711467877.1A CN201711467877A CN108089388B CN 108089388 B CN108089388 B CN 108089388B CN 201711467877 A CN201711467877 A CN 201711467877A CN 108089388 B CN108089388 B CN 108089388B
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electrode
regulating
controlling
working voltage
lower substrate
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CN108089388A (en
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宋爱民
贺丹丹
辛倩
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Jinan Jiayuan Electronics Ltd
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Shandong University
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/155—Electrodes

Abstract

The invention relates to a method for regulating and controlling the working voltage of an electric dimming device, which comprises a lower substrate, a regulating and controlling electrode, an ion storage layer, an electrolyte, a color-changing layer, a transparent electrode and an upper substrate from bottom to top in sequence, wherein the ion storage layer and the color-changing layer are the same polythiophene derivative; the electrolyte is a mixture of sodium polystyrene sulfonate, glycerol, sorbitol, deionized water and titanium dioxide; the transparent electrode is an ITO electrode; the method comprises the following steps: the working voltage of the electric dimming device is adjusted and controlled by changing the material of the adjusting and controlling electrode, namely the external voltage applied to the device when the optical density reaches saturation or is close to saturation. The electrode material is wide in material, the adjustable range of the working voltage of the electric light adjusting device is large by adjusting and controlling the electrode material, the working voltage of the electric light adjusting device is easily adjusted to be in a lower state, and the low-voltage driven electric light adjusting device has good application prospect in the fields of passive driving, low-power consumption electronic circuits and the like.

Description

Method for selectively controlling working voltage of electric dimming device
Technical Field
The invention relates to a method for selectively controlling the working voltage of an electric dimming device, belonging to the technical field of thin film displays.
Background
An electro-optical material is a new functional material that has been rapidly developed in recent years, and its optical properties (reflectivity, transmittance, absorption, etc.) change stably and reversibly under the action of an applied electric field or voltage, and its appearance shows changes in color and transparency.
The common electric light modulation comprises inorganic and organic substances, wherein the former mainly comprises transition metal oxides and analogues thereof, and the latter comprises polyaniline, polythiophene and derivatives thereof, viologen and the like.
Electric modulation optical display device was first used by s.k.deb in 1969 using amorphous WO3And (3) preparing the film. The advantages of the electrically tunable optical display device, such as low power consumption, low cost, high contrast, no viewing angle limitation (compared with liquid crystal display), and memory effect in an open circuit state, make it have a high research value and a good application prospect, such as smart windows, displays, military anti-counterfeiting, and anti-glare rearview mirrors for automobiles, which are widely used.
The electrically tunable optical display device is generally composed of an upper electrode, a lower electrode (at least 1 transparent), a color changing layer, an electrolyte layer, and an ion storage layer. At present, many research reports have been made on electric dimming devices at home and abroad, but most of the research reports focus on enhancing the optical contrast and the coloring efficiency of the devices and improving the cycle life and the like by optimizing a color changing layer, an ion storage layer and electrolyte, while the attention on reducing the working voltage of the devices is low, and particularly, the article for regulating and controlling the working voltage of the electric dimming devices through a conductive electrode is more fresh. The operating voltage is generally the drive voltage required to electrically tune the device in the saturated (or near saturated) colored and bleached states, and can also be expressed as the applied voltage applied to the device when the optical density of the device is at or near saturation.
Threshold voltage VthThe minimum voltage required for the device to begin to discolor. In practical applications, to improve the contrast of the device, the device is usually required to be discolored as completely as possible, and a ratio of V is usually requiredthThe device is driven by a much larger operating voltage, and therefore, the operating voltage has a greater reference and application value than the threshold voltage. However, no report on the systematic study of different metal electrodes on the working voltage is found at present.
Literature [ Yoshimura T, Watanabe M, Koike Y, et al.electrochromism in a Thin-Film Device Using Li2WO4as an Li-Electrolysis [ J].Japanese Journal of Applied Physics,1983,22(1R):152.]In (A) is based on WO3The four-layer structure (transparent upper electrode, WO)3Color changing layer, electrolyte layer, non-transparent lower electrode) using gold (Au), palladium (Pd), aluminum (Al) as non-transparent electrodes, respectively, and the threshold voltage V is mentionedthIncreases with decreasing work function of the non-transparent electrode, but there is no mention of the dependence of the working voltage on the electrode material, and since there are only 3 electrode types studied here, VthThe regularity and the relevance of the work function of the electrode are still subject to further examination. In addition, the threshold voltage (V) of the electric dimming device reported thereinth) Both are high (more than 1.1V) and have larger actual working voltage (more than 2.4V).
Literature [ Kuwabara K,Ichikawa S,Sugiyama K.On a Solid-State ECD,WO3/Solid Electrolyte/Metal[J].Bulletin of the Chemical Society of Japan,1987,60(2):747-752.]An electric dimming device with a four-layer structure (a transparent upper electrode, a color changing layer, an electrolyte layer and a non-transparent lower electrode) is prepared by using different materials as non-transparent electrodes, wherein the electric dimming material is vacuum evaporation WO3The electrolyte is Sn (HPO)4)2The non-transparent electrode is made of silver (Ag), aluminum (Al), gold (Au), copper (Cu), iron (Fe), nickel (Ni), platinum (Pt), tin (Sn), titanium (Ti), zinc (Zn), zirconium (Zr) and graphite plate. V when other devices are colored except for electric dimming device with Ag electrodethAt 1.7-3.5V and has a tendency of decreasing with the increase of the work function of the electrode, the reason is unknown, and the V of the Ag electrode electric dimming devicethAs low as 0.5V, the authors believe this is due to Ag and OH adsorbed at the interface from water decomposition-The reason why the operating voltage varies with the electrode is not mentioned.
In addition, the above two reports that the electrode material has no ion storage layer for the device used in the literature that the electrode material has an influence on the electrical dimming device, and the non-transparent electrode of the device is in direct contact with the electrolyte, so that it is difficult to eliminate the influence on the device performance caused by the chemical reaction between the electrode material and the electrolyte. In addition, although the minimum threshold voltage of these devices is 0.5V, the actual operating voltage is higher, and is above 3V, which has a certain limitation for the application of the electric dimming device in electronic circuits with low power consumption (such as wearable electronics).
Shen D E et al report that the operating voltage of the device can be lowered (2V to 0.6V) by adding different ion storage layers, but the process is complicated by preparing the film and the ion storage layers by a method of polymerization first and blade coating (the dispersion obtained by polymerizing the monomer is formed by a blade coating method), and in addition, when assembling the electric dimming device, the color-changing layer and the ion storage layer therein need to be in a reduced state and an oxidized state, respectively, and for the same ion storage layer, different EC materials are used instead, and the coloring performance of the device is different, so that the method has no universality.
Yoshimura T et al and Kuwabara K et al byV capable of realizing regulation and control of device by changing electrode within certain voltage rangethHowever, the device has no ion storage layer, and the electrode is directly contacted with the electrolyte, so the reason of the electrode for regulating the threshold voltage is not very clear, and the electrode material is not changed to regulate the working voltage of the device, and in addition, the working voltage of the device is higher (more than 2.4-3V).
Chinese patent document CN104898345A discloses a driving arrangement structure for electrochromic glass, which solves the technical defect that large-area electrochromic glass has too high effective driving voltages on both sides and insufficient middle effective driving voltage, resulting in uneven electrochromic of electrochromic glass, and adds L-shaped metal conductive strips with higher conductivity on the bottom and top conductive layers with slightly worse conductivity (such as oxide electrodes) than the metal electrodes, where the upper and lower metal conductive strips are respectively disposed on the long and short sides of both sides of the top and bottom conductive layers, and shortens the electrical effect distance between the upper electrode conductive strip and the lower electrode conductive strip as much as possible, so as to enhance the uniformity of potential distribution on the top and bottom electrodes, thereby improving the distribution of effective driving voltages of electrochromic glass. But the scheme only makes the color change of the large-area electrochromic glass more uniform and does not substantially reduce the working voltage of the whole electrochromic glass.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for regulating and controlling the working voltage of an electric dimming device;
the technical scheme of the invention is as follows:
a method for regulating and controlling the working voltage of an electric dimming device comprises a lower substrate, a regulating and controlling electrode, an ion storage layer, an electrolyte, a color changing layer, a transparent electrode and an upper substrate from bottom to top in sequence, wherein the upper substrate or the lower substrate is made of transparent plastics (polyethylene terephthalate (PET), Polycarbonate (PC), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT) and the like), transparent glass or inorganic transparent insulating materials (mica and Al2O3Transparent ceramics, etc.); the ion storage layer and the color changing layer are the same polythiophene derivative; the electrolyte is polystyreneA mixture of sodium sulfonate (PSSNa), glycerin, sorbitol, deionized water, titanium dioxide; the transparent electrode is an ITO electrode; the method comprises the following steps: the working voltage of the electric light adjusting device is adjusted and controlled by changing the material of the adjusting and controlling electrode, wherein the working voltage of the electric light adjusting device is the external voltage applied to the electric light adjusting device when the optical density reaches saturation or is close to saturation.
The electrode material is widely available, the adjustable range of the working voltage of the electric dimming device is large by adjusting and controlling the electrode material, the working voltage of the electric dimming device is easily adjusted to a lower state, the low-voltage driven electric dimming device has good application prospects in the fields of passive driving, low-power consumption electronic circuits and the like, the standby time of a battery is prolonged if the low-voltage driven electric dimming device can be applied to displays of portable equipment such as wearable electronic products and mobile phones, and the power consumption can be remarkably reduced if the low-voltage driven electric dimming device is applied to display of a super-large area.
The polythiophene derivative is used as an ion storage layer material, reversible color change reaction and ion storage can be realized simultaneously, and the service life of the device is prolonged, the response speed is increased, the color fading contrast of the device is improved, and the like.
According to the present invention, the material of the control electrode includes metal (such as Ag, Ni, Ti, Au), non-metal conductor (such as carbon electrode), conductive metal oxide (including doped metal oxide) (such as indium tin oxide ITO, aluminum-doped zinc oxide AZO, etc.), and conductive nitride (such as titanium nitride, titanium oxynitride, tantalum nitride, etc.).
These electrode materials need to be chemically inert with respect to the ion storage layer of the electrical dimming material with which they are in contact. The operating voltage of the device can be regulated by using a plurality of different conductive electrode materials.
Further preferably, the material of the control electrode includes Ag, Ni, Ti, C, and Au.
Five electrodes made of Ag, Ni, Ti, C and Au are adopted, the coloring working voltage can be regulated and controlled within-0.74V to-1.35V, and the fading working voltage can be regulated and controlled within 0.31V to 0.69V. By using Ag or Ni as an electrode material, the working voltage can be remarkably reduced, low power consumption (<1mW) and quick response (the response time can be as low as 0.75s) can be achieved, and some devices can be subjected to almost 1000 cycles without attenuation.
According to the present invention, preferably, the change of the material of the control electrode means: and respectively depositing the materials of the regulating electrodes on the lower substrate.
Further preferably, the change of the material of the control electrode means: and respectively depositing the material of the regulating electrode on the lower substrate by a vacuum evaporation, electroplating or printing method.
Because most of the electrode materials can be formed into films by adopting common industrialized methods such as vacuum evaporation, printing and the like, the method for regulating and controlling the conductive electrode material is very simple and convenient and is easy to implement.
According to the invention, the preferable mass ratio of the sodium polystyrene sulfonate, the glycerol, the sorbitol, the deionized water and the titanium dioxide is 40:10:10: 40: 5.
the mass ratio is 40:10:10: 40: 5, the proportion can realize white electrolyte hydrogel with higher ion concentration and better moisture retention, can provide enough transport ions for an electric dimming device, has good coating and film forming properties, has higher solidification speed, is easy to package the device, and can better shield the ground color of an ion storage layer and an electrode.
The invention has the beneficial effects that:
1. the invention adopts a plurality of different conductive electrode materials, including transparent electrodes, non-transparent metal and carbon electrodes, regulates and controls the distribution of electric field in the electric dimming device by regulating and controlling the conductive electrodes (such as work function, and the like), achieves the purpose of regulating and controlling the working voltage of the device, and has strong universality on the electric dimming device.
2. The invention has wide regulation range of the working voltage of the electric dimming device, can reduce the working voltage of the device to a lower level, and can use certain metals (for example, Ag, Ni and the like can reduce the working voltage to-0.74V) as electrodes when the device with lower working voltage is needed.
3. Because most of the electrode materials can be formed into films by adopting common industrialized methods such as vacuum evaporation, printing and the like, the method for regulating and controlling the conductive electrode material is very simple and convenient and is easy to implement. In addition, the electrode material is rich and comprises metal, conductive inorganic matters, conductive organic matters and the like, and the material obtaining range is wide.
Drawings
FIG. 1 is a schematic structural diagram of an electrical dimming device according to the present invention;
FIG. 2 is a schematic diagram showing the variation curve of optical density with applied voltage when the material of the control electrode is Ag;
FIG. 3 is a schematic diagram showing the variation curve of optical density with applied voltage when the material of the control electrode is Ni;
FIG. 4 is a schematic diagram showing the variation curve of optical density with applied voltage when the material of the control electrode is Ti;
FIG. 5 is a schematic diagram showing the variation curve of optical density with applied voltage when the material of the control electrode is C;
FIG. 6 is a schematic diagram showing the variation curve of optical density with applied voltage when the control electrode is made of Au;
Detailed Description
The invention is further defined in the following, but not limited to, the figures and examples in the description.
Examples
A method for regulating and controlling the working voltage of an electric dimming device is disclosed in figure 1, and the electric dimming device sequentially comprises a lower substrate, a regulating and controlling electrode, an ion storage layer, an electrolyte, a color changing layer, a transparent electrode and an upper substrate from bottom to top, wherein the upper substrate or the lower substrate is made of transparent plastics (polyethylene terephthalate (PET), Polycarbonate (PC), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT) and the like), transparent glass or inorganic transparent insulating materials (mica and Al, and the like)2O3Transparent ceramics, etc.); the ion storage layer and the color changing layer are the same polythiophene derivative; the electrolyte is prepared from the following components in percentage by mass: 10:10: 40: 5 sodium polystyrene sulfonate (PSSNa), glycerol, sorbitol, deionized water, titanium dioxide; the transparent electrode is an ITO electrode; the working Voltage of the electric dimming device can be adjusted by changing the material of the adjusting electrode, and can be obtained from an Optical density-Voltage curve chart, which means that the Optical density is applied when the Optical density reaches saturation or is close to saturation (curve inflection point)An applied voltage across the device.
The electrode material is widely available, the adjustable range of the working voltage of the electric dimming device is large by adjusting and controlling the electrode material, the working voltage of the electric dimming device is easily adjusted to a lower state, the low-voltage driven electric dimming device has good application prospects in the fields of passive driving, low-power consumption electronic circuits and the like, the standby time of a battery is prolonged if the low-voltage driven electric dimming device can be applied to displays of portable equipment such as wearable electronic products and mobile phones, and the power consumption can be remarkably reduced if the low-voltage driven electric dimming device is applied to display of a super-large area.
The polythiophene derivative is used as an ion storage layer material, reversible color change reaction and ion storage can be realized simultaneously, and the service life of the device is prolonged, the response speed is increased, the color fading contrast of the device is improved, and the like.
The material of the regulating electrode comprises Ag, Ni, Ti, C and Au.
Five electrodes made of Ag, Ni, Ti, C and Au are adopted, the coloring working voltage can be regulated and controlled within-0.74V to-1.35V, and the fading working voltage can be regulated and controlled within 0.31V to 0.69V. By using Ag or Ni as an electrode material, the working voltage can be remarkably reduced, low power consumption (<1mW) and quick response (the response time can be as low as 0.75s) can be achieved, and some devices can be subjected to almost 1000 cycles without attenuation.
The working voltage of the electric dimming device is regulated and controlled by changing the material of the regulating and controlling electrode, and the method specifically comprises the following steps:
(1) depositing a conditioning electrode on a lower substrate, respectively performing the following operations, including: vacuum evaporation, electroplating or printing Ag on the lower substrate; vacuum evaporation, electroplating or printing Ni on the lower substrate; vacuum evaporation, electroplating or printing Ti on the lower substrate; vacuum evaporation, electroplating or printing C on the lower substrate; performing vacuum evaporation, electroplating or printing of Au on the lower substrate;
(2) depositing a transparent electrode on an upper substrate, comprising: vacuum evaporation, electroplating and printing a transparent electrode with a certain thickness (more than dozens of nanometers) on the upper substrate;
(3) respectively depositing an ion storage layer on the regulating electrode prepared in the step (1), wherein the ion storage layer comprises: and printing, spin coating and vacuum depositing a (e.g. micro-nano scale) ion storage layer with a certain thickness on the regulating electrode. The structure, quality, storage capability and the like of the thin film can be regulated and controlled by heat treatment (such as substrate heating, baking and the like), regulation and control of the thickness of the thin film (such as multiple deposition) and the like.
(4) Depositing a color shifting layer on the transparent electrode, comprising: printing, spin coating, and vacuum depositing a color-changing layer (such as micro-nano scale) with a certain thickness on the transparent electrode; the film structure, quality and color-changing contrast can be controlled by heat treatment (such as substrate heating, baking, etc.), film thickness control (such as multiple deposition), etc.
(5) Preparing an electrolyte: the method comprises the following steps:
A. uniformly mixing sodium polystyrene sulfonate (PSSNa), glycerol, sorbitol and deionized water at room temperature according to the weight ratio of 40:10:10:40 (such as magnetic stirring for 1 hour);
B. adding 5 wt% of TiO2Mixing the powder and the mixture evenly (such as magnetic stirring for 1 hour);
C. the uniform white viscous electrolyte is obtained by the methods of ultrasonic treatment and defoaming.
(6) And (3) forming a film (such as coating, printing and the like) on the color-changing layer or the ion storage layer by using the electrolyte prepared in the step (5), drying for about 3 minutes or placing a volatile solvent in the air, and bonding the color-changing layer and the ion storage layer together when the electrolyte is about to solidify to obtain the five electric-modulation optical displays with the sandwich structures.
Wherein, the change curve of the optical density with the applied voltage when the regulating electrode material is Ag is shown in fig. 2, the change curve of the optical density with the applied voltage when the regulating electrode material is Ni is shown in fig. 3, the change curve of the optical density with the applied voltage when the regulating electrode material is Ti is shown in fig. 4, the change curve of the optical density with the applied voltage when the regulating electrode material is C is shown in fig. 5, and the change curve of the optical density with the applied voltage when the regulating electrode material is Au is shown in fig. 6; in FIGS. 2-6, the abscissa Voltage represents applied Voltage and the ordinate Optical density represents Optical density; colouring process means colouring process and blanking process means discolouration process;
table 1 shows in detail the condition of different conductive electrodes (control electrodes) of the electric light modulation device in this embodimentThe materials of the material are respectively Ag, Ni, Ti, C and Au), VcAnd VbRespectively representing the operating voltage for coloring the device (i.e., the applied voltage applied to the device at or near saturation of optical density during coloring) and the operating voltage for bleaching (i.e., the applied voltage applied to the device at or near saturation of optical density during bleaching); t is tcAnd tbRespectively representing the time taken for the reflectivity change to reach 90% of the difference of the colorfully-faded state reflectivity during the coloring and fading of the device; Δ R represents the difference in reflectivity of the device in the bleached state and the colored state. Each parameter in table 1 is an average value of test results of five types of electric dimming devices prepared under the same condition.
As can be seen from Table 1, the electric dimming device using silver (Ag) as the control electrode has the minimum working voltage during coloring and fading, which can be as low as-0.74V and 0.31V, while the electric dimming device using titanium (Ti) as the control electrode has the fastest response to the transition between the colored state and the faded state, the response time of the coloring process is only 0.75s, and the electric dimming device using carbon (C) as the control electrode has the best cycle stability and almost no fading cycle for 1000 times.
TABLE 1
Figure BDA0001531460430000061

Claims (4)

1. A method for regulating and controlling the working voltage of an electric dimming device comprises a lower substrate, a regulating and controlling electrode, an ion storage layer, an electrolyte, a color changing layer, a transparent electrode and an upper substrate from bottom to top in sequence, wherein the upper substrate or the lower substrate is made of transparent plastics or inorganic transparent insulating materials; the ion storage layer and the color changing layer are the same polythiophene derivative; the electrolyte is a mixture of sodium polystyrene sulfonate, glycerol, sorbitol, deionized water and titanium dioxide; the transparent electrode is an ITO electrode, and is characterized by comprising: regulating and controlling the working voltage of the electric light modulation device by changing the material of the regulating and controlling electrode, wherein the working voltage of the electric light modulation device is an external voltage applied to the device when the optical density reaches saturation or is close to saturation; the material of the regulating electrode comprises Ag, Ni, Ti, C and Au; adopting five electrodes made of Ag, Ni, Ti, C and Au, regulating and controlling the coloring working voltage within-0.74V to-1.35V, regulating and controlling the fading working voltage within 0.31V to 0.69V, wherein the reflectivity change within 0.75-4.24 s reaches 90% of the reflectivity difference of the coloring state, and the reflectivity change within 1.58-4.56 s reaches 90% of the reflectivity difference of the fading state; the method comprises the following specific steps:
(1) depositing a conditioning electrode on a lower substrate, respectively performing the following operations, including: vacuum evaporation, electroplating or printing Ag on the lower substrate; vacuum evaporation, electroplating or printing Ni on the lower substrate; vacuum evaporation, electroplating or printing Ti on the lower substrate; vacuum evaporation, electroplating or printing C on the lower substrate; performing vacuum evaporation, electroplating or printing of Au on the lower substrate;
(2) depositing a transparent electrode on the upper substrate;
(3) respectively depositing ion storage layers on the regulating electrodes prepared in the step (1);
(4) depositing a color-changing layer on the transparent electrode;
(5) preparing an electrolyte;
(6) and (3) forming a film on the electrolyte prepared in the step (5) on the color changing layer or the ion storage layer, drying for 3 minutes or placing a volatile solvent in the air, and bonding the color changing layer and the ion storage layer together when the electrolyte is about to solidify to obtain the five electric-modulation optical displays with sandwich structures.
2. The method for regulating and controlling the operating voltage of an electric dimming device according to claim 1, wherein the changing of the material of the regulating electrode is: and respectively depositing the materials of the regulating electrodes on the lower substrate.
3. The method for regulating and controlling the operating voltage of an electric dimming device according to claim 1, wherein the changing of the material of the regulating electrode is: and respectively depositing the material of the regulating electrode on the lower substrate by a vacuum evaporation, electroplating or printing method.
4. The method for regulating and controlling the operating voltage of an electric dimming device according to any one of claims 1 to 3, wherein the mass ratio of the sodium polystyrene sulfonate, the glycerol, the sorbitol, the deionized water and the titanium dioxide is 40:10:10: 40: 5.
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